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Dave Watson d97af30f61 tcp: fix null ptr deref in getsockopt(..., TCP_ULP, ...)
If icsk_ulp_ops is unset, it dereferences a null ptr.
Add a null ptr check.

BUG: KASAN: null-ptr-deref in copy_to_user include/linux/uaccess.h:168 [inline]
BUG: KASAN: null-ptr-deref in do_tcp_getsockopt.isra.33+0x24f/0x1e30 net/ipv4/tcp.c:3057
Read of size 4 at addr 0000000000000020 by task syz-executor1/15452

Signed-off-by: Dave Watson <davejwatson@fb.com>
Reported-by: "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-27 15:39:11 -04:00
arch Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-06-21 17:35:22 -04:00
block block: Fix a blk_exit_rl() regression 2017-06-14 13:27:50 -06:00
certs scripts/spelling.txt: add "intialise(d)" pattern and fix typo instances 2017-05-08 17:15:13 -07:00
crypto crypto : asymmetric_keys : verify_pefile:zero memory content before freeing 2017-06-09 13:29:50 +10:00
Documentation net: remove policy-routing.txt documentation 2017-06-27 14:38:17 -04:00
drivers vxlan: fix incorrect nlattr access in MTU check 2017-06-27 14:40:35 -04:00
firmware firmware/Makefile: force recompilation if makefile changes 2017-05-08 17:15:10 -07:00
fs Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-06-21 17:35:22 -04:00
include net: add netlink_ext_ack argument to rtnl_link_ops.slave_validate 2017-06-26 23:13:22 -04:00
init Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-05-10 10:30:46 -07:00
ipc mm: introduce kv[mz]alloc helpers 2017-05-08 17:15:12 -07:00
kernel bpf: possibly avoid extra masking for narrower load in verifier 2017-06-23 14:04:11 -04:00
lib net: manual clean code which call skb_put_[data:zero] 2017-06-20 13:30:15 -04:00
mm Allow stack to grow up to address space limit 2017-06-21 11:07:18 -07:00
net tcp: fix null ptr deref in getsockopt(..., TCP_ULP, ...) 2017-06-27 15:39:11 -04:00
samples samples/bpf: fix a build problem 2017-06-22 11:35:19 -04:00
scripts scripts/gdb: make lx-dmesg command work (reliably) 2017-06-02 15:07:38 -07:00
security Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-06-21 17:35:22 -04:00
sound ALSA: timer: Fix missing queue indices reset at SNDRV_TIMER_IOCTL_SELECT 2017-06-07 10:25:23 +02:00
tools Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-06-21 17:35:22 -04:00
usr initramfs: fix disabling of initramfs (and its compression) 2017-06-02 15:07:37 -07:00
virt KVM: arm/arm64: Handle possible NULL stage2 pud when ageing pages 2017-06-06 15:28:40 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore kbuild: Add support to generate LLVM assembly files 2017-04-25 08:13:52 +09:00
.mailmap power supply and reset changes for the v4.12 series (part 2) 2017-05-12 12:02:21 -07:00
COPYING
CREDITS avr32: remove support for AVR32 architecture 2017-05-01 09:27:15 +02:00
Kbuild kbuild: Consolidate header generation from ASM offset information 2017-04-13 05:43:37 +09:00
Kconfig
MAINTAINERS tls: kernel TLS support 2017-06-15 12:12:40 -04:00
Makefile Linux 4.12-rc6 2017-06-19 22:19:37 +08:00
README README: add a new README file, pointing to the Documentation/ 2016-10-24 08:12:35 -02:00

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.